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Walls supporting one floor only

Max. Tributary Width* (ft)
One Floor Only
Member
Size
Wall
Height
Member
Spacing
16"o.c.Floor Load
40LL + 12DL
2x4 8' 16"o.c. 16
24"o.c. 9
9' 16"o.c. 11
24"o.c.
10' 16"o.c.
24"o.c.
2x6 8' 16"o.c. 25
24"o.c. 22
9' 16"o.c. 25
24"o.c. 22
10' 16"o.c. 25
24"o.c. 22
12' 16"o.c. 23
24"o.c. 13
14' 16"o.c. 15
24"o.c.


Walls supporting attic framing only
* Tributary width is calculated as a percentage of the sum of the joist spans on either side of the wall:
     simple span: 0.5 ft x (left span + right span)
     continuous span: 0.625 ft x (left span + right span)

Max. Tributary Width* (ft)
Attic Framing Only
Member
Size
Wall
Height
Member
Spacing
16"o.c.Floor Load
40LL + 12DL
2x4 8' 16"o.c. 25
24"o.c. 15
9' 16"o.c. 20
24"o.c. 11
10' 16"o.c. 14
24"o.c.
2x6 8' 16"o.c. 25
24"o.c. 25
9' 16"o.c. 25
24"o.c. 25
10' 16"o.c. 25
24"o.c. 25
12' 16"o.c. 25
24"o.c. 22
14' 16"o.c. 25
24"o.c. 13


Max. Vertical Load (plf)
Interior Walls Only
Wall
Height
Member
Length
2x4 Wall 2x6 Wall
On-Center Spacing On-Center Spacing
12" 16" 24" 12" 16" 24"
8' 92-5/8" 1204 837 479 2365 1774 1183
9' 104-5/8" 892 607 331 2365 1774 1183
10' 116-5/8" 671 446 227 2365 1774 1183
12' 144"       1742 1203 680
14' 168"       1179 791 414